Yerbury, Hilary, author
University of Technology, 1992
Buku Referensi
edited by Andrew Booth and Anne Brice
Facet Publishing, 2004
Buku Referensi
Dority, G. Kim, author
Libraries Unlimited, 2006
Buku Teks
Parker, C.C. (Christopher Charles), author
Butterworths, 1960
Buku Teks
Indiana Purdue University Press, 2014
Buku Teks